This hasn't worked in the Android Gmail app for several years now. The option is there, but no matter what I select when replying to an email it will ALWAYS sen

This hasn't worked in the Android Gmail app for several years now. The option is there, but no matter what I select when replying to an email it will ALWAYS send it from the address it was sent to. So let's say I have 2 email address, me@gmail.com and me@mydomain.com. My gmail account is setup so I can send from either one. If I get an email sent to me@mydomain.com and I change the From address to me@gmail.com in my reply, it always sends it from me@mydomain.com anyway. It doesn't matter what I select for the from address. This doesn't happen in the normal gmail web interface, it's only the Android app. The thing is that this used to work a few years ago (Android 2.2 or very early in 2.3). It was broke in an update at some point and still hasn't been fixed. I've tried reporting the bug, and even had a Google employee verify he has the same problem, but it's unfortunately still there. I've verified it with other people, and it's happened on the past 3 Android phones I've had, so it seems to be a universal problem.